"Jeg har ingen interesse i dette."

Translation: I have no interest in this.

[AlexMoby]

If I assume well, "renten" is used for bussiness interest while "interessen" is general ?

[Jnwulff]

Renten is only used for money and is the percentage of the money you will receive or have to pay for having money in a bank/ having a loan/ owning stocks

[LucBE]

Interest as in business interest, stake?

[Jnwulff]

More like i do not care about this or i do not want this